Standortverlauf

import datetime
import json


def read_json(file):
    with open(file) as fd:
        return json.load(fd)["locations"]


def convert_timestamps(locations):
    for loc in locations:
        convert_timestamp(loc)


def convert_timestamp(location):
    from_ts = datetime.datetime.fromtimestamp
    location["timestamp"] = from_ts(int(location["timestampMs"]) / 1000).astimezone(datetime.timezone.utc)
    del location["timestampMs"]


def convert_locations(locations):
    for loc in locations:
        convert_location(loc)


def convert_location(location):
    lat, long = int(location['latitudeE7']), int(location['longitudeE7'])
    # 32 bit overflow bugfix
    if lat > 900000000:
        lat -= 4294967296
    if long > 1800000000:
        long -= 4294967296
    lat /= 1e7
    long /= 1e7
    del location['latitudeE7'], location['longitudeE7']
    location['lat'] = lat
    location['long'] = long


def by_datetime(locations, start=None, end=None):
    if start:
        start = start.astimezone(datetime.timezone.utc)
    if end:
        end = end.astimezone(datetime.timezone.utc)
    if start and end:
        condition = lambda ts: start <= ts <= end
    elif start and end is None:
        condition = lambda ts: start <= ts
    elif start is None and end:
        condition = lambda tx: ts <= end
    else:
        raise TypeError("start and/or end must be given")
    for loc in locations:
        if condition(loc["timestamp"]):
            yield loc


def area(locations):
    iterator = iter(locations)
    first = next(iterator)
    lat, long = first["lat"], first["long"]
    min_lat = lat
    max_lat = lat
    min_long = long
    max_long = long
    for loc in iterator:
        lat, long = loc["lat"], loc["long"]
        min_lat = min(min_lat, lat)
        max_lat = max(max_lat, lat)
        min_long = min(min_long, long)
        max_long = max(max_long, long)
    return {
        "min_lat": min_lat,
        "max_lat": max_lat,
        "min_long": min_long,
        "max_long": max_long,
    }


locations = read_json("Standortverlauf.json")
convert_timestamps(locations)
convert_locations(locations)

week = datetime.timedelta(days=7)
today = datetime.datetime.now()

last_7_days = list(by_datetime(locations, today - week))
print(f"Last 7 days: {len(last_7_days)} datapoints")